<?php

/**
 * Preset Admin callbacks and required functions.
 */
function imagecache_ui_preset_overview() {
    $header = array(t('Preset Name'), t('Storage'), t('Actions'));
    $rows = array();
    // Always clear the preset cache on this display.
    foreach (imagecache_presets(TRUE) as $preset) {
        $row = array();
        $row[] = l($preset['presetname'], 'admin/build/imagecache/' . $preset['presetid']);
        $links = array();
        switch ($preset['storage']) {
            case IMAGECACHE_STORAGE_DEFAULT:
                $row[] = t('Default');
                $links[] = l(t('View'), 'admin/build/imagecache/' . $preset['presetid']);
                $links[] = l(t('Flush'), 'admin/build/imagecache/' . $preset['presetid'] . '/flush');
                break;
            case IMAGECACHE_STORAGE_OVERRIDE:
                $row[] = t('Override');
                $links[] = l(t('Edit'), 'admin/build/imagecache/' . $preset['presetid']);
                $links[] = l(t('Revert'), 'admin/build/imagecache/' . $preset['presetid'] . '/delete');
                $links[] = l(t('Flush'), 'admin/build/imagecache/' . $preset['presetid'] . '/flush');
                $links[] = l(t('Export'), 'admin/build/imagecache/' . $preset['presetid'] . '/export');
                break;
            case IMAGECACHE_STORAGE_NORMAL:
                $row[] = t('Normal');
                $links[] = l(t('Edit'), 'admin/build/imagecache/' . $preset['presetid']);
                $links[] = l(t('Delete'), 'admin/build/imagecache/' . $preset['presetid'] . '/delete');
                $links[] = l(t('Flush'), 'admin/build/imagecache/' . $preset['presetid'] . '/flush');
                $links[] = l(t('Export'), 'admin/build/imagecache/' . $preset['presetid'] . '/export');
                break;
        }
        $row[] = implode('&nbsp;&nbsp;&nbsp;&nbsp;', $links);
        $rows[] = $row;
    }
    $output = theme('table', $header, $rows);
    return $output;
}

function imagecache_ui_preset_delete_form($form_state, $preset = array()) {
    if (empty($preset)) {
        drupal_set_message(t('The specified preset was not found'), 'error');
        drupal_goto('admin/build/imagecache');
    }

    $form = array();
    $form['presetid'] = array('#type' => 'value', '#value' => $preset['presetid']);
    return confirm_form(
            $form, t('Are you sure you want to delete the preset %preset?', array('%preset' => $preset['presetname'])
            ), 'admin/build/imagecache', t('This action cannot be undone.'), t('Delete'), t('Cancel')
    );
}

function imagecache_ui_preset_delete_form_submit($form, &$form_state) {
    $preset = imagecache_preset($form_state['values']['presetid']);
    imagecache_preset_delete($preset);
    drupal_set_message(t('Preset %name (ID: @id) was deleted.', array('%name' => $preset['presetname'], '@id' => $preset['presetid'])));
    $form_state['redirect'] = 'admin/build/imagecache';
}

function imagecache_ui_preset_flush_form(&$form_state, $preset = array()) {
    if (empty($preset)) {
        drupal_set_message(t('The specified preset was not found'), 'error');
        $form_state['redirect'] = 'admin/build/imagecache';
    }

    $form = array();
    $form['presetid'] = array('#type' => 'value', '#value' => $preset['presetid']);
    return confirm_form(
            $form, t('Are you sure you want to flush the preset %preset?', array('%preset' => $preset['presetname'])
            ), 'admin/build/imagecache', t('This action cannot be undone.'), t('Flush'), t('Cancel')
    );
}

function imagecache_ui_preset_flush_form_submit($form, &$form_state) {
    $preset = imagecache_preset($form_state['values']['presetid']);
    imagecache_preset_flush($preset);
    drupal_set_message(t('Preset %name (ID: @id) was flushed.', array('%name' => $preset['presetname'], '@id' => $preset['presetid'])));
    $form_state['redirect'] = 'admin/build/imagecache';
}

/**
 * Imagecache preset export form.
 */
function imagecache_ui_preset_export_form(&$form_state, $preset = array()) {
    if (empty($preset)) {
        drupal_set_message(t('The specified preset was not found'), 'error');
        $form_state['redirect'] = 'admin/build/imagecache';
    }

    if (isset($preset['presetid'])) {
        unset($preset['presetid']);
    }
    if (isset($preset['storage'])) {
        unset($preset['storage']);
    }
    foreach ($preset['actions'] as $id => $action) {
        unset($preset['actions'][$id]['actionid']);
        unset($preset['actions'][$id]['presetid']);
    }
    $exported = '$presets = array();';
    $exported .= "\n";
    $exported .= '$presets[\'' . $preset['presetname'] . '\'] = ';
    $exported .= var_export($preset, TRUE) . ';';
    $rows = substr_count($exported, "\n") + 1;

    $form = array();
    $form['export'] = array(
        '#type' => 'textarea',
        '#default_value' => $exported,
        '#rows' => $rows,
        '#resizable' => FALSE,
    );
    return $form;
}

function imagecache_ui_preset_form($form_state, $preset = array()) {
    $form = array();

    $form['presetid'] = array(
        '#type' => 'value',
        '#value' => isset($preset['presetid']) ? $preset['presetid'] : '',
    );

    // Browsers don't submit disabled form values so we've got to put two copies
    // of the name on the form: one for the submit handler and one for the user.
    if (isset($preset['storage']) && $preset['storage'] === IMAGECACHE_STORAGE_DEFAULT) {
        $form['presetname'] = array(
            '#type' => 'value',
            '#value' => $preset['presetname'],
        );
        $form['presetname_display'] = array(
            '#type' => 'textfield',
            '#size' => '64',
            '#title' => t('Preset Namespace'),
            '#default_value' => $preset['presetname'],
            '#disabled' => TRUE,
        );
    } else {
        $form['presetname'] = array(
            '#type' => 'textfield',
            '#size' => '64',
            '#title' => t('Preset Namespace'),
            '#default_value' => isset($preset['presetname']) ? $preset['presetname'] : '',
            '#description' => t('The namespace is used in URL\'s for images to tell imagecache how to process an image. Please only use alphanumeric characters, underscores (_), and hyphens (-) for preset names.'),
            '#validate' => array('imagecache_element_presetname_validate' => array()),
        );
    }

    $form['submit'] = array(
        '#type' => 'submit',
        '#value' => isset($preset['storage']) && $preset['storage'] === IMAGECACHE_STORAGE_DEFAULT ? t('Override Defaults') : t('Save Preset'),
        '#weight' => 9,
    );

    // For new presets don't show the preview or all actions to be added.
    if (empty($preset['presetid'])) {
        return $form;
    }

    $form['actions'] = array(
        '#type' => 'fieldset',
        '#title' => t('Actions'),
        '#tree' => TRUE,
        '#theme' => 'imagecache_ui_preset_actions',
    );

    foreach ($preset['actions'] as $i => $action) {
        // skip unknown actions...
        if (!$definition = imagecache_action_definition($action['action'])) {
            continue;
        }
        $action_form['name'] = array(
            '#value' => t($definition['name']),
        );

        $action_form['action'] = array(
            '#type' => 'value',
            '#value' => $action['action'],
        );
        $action_form['actionid'] = array(
            '#type' => 'value',
            '#value' => $action['actionid'],
        );
        $action_form['presetid'] = array(
            '#type' => 'value',
            '#value' => $action['presetid'],
        );

        $action_form['settings'] = array(
            '#theme' => $action['action'],
            '#value' => $action['data'],
        );
        $action_form['data'] = array(
            '#type' => 'value',
            '#value' => $action['data'],
        );
        $action_form['weight'] = array(
            '#type' => 'weight',
            '#default_value' => $action['weight'],
            '#access' => $preset['storage'] !== IMAGECACHE_STORAGE_DEFAULT,
        );
        $action_form['configure'] = array(
            '#value' => l(t('Configure'), 'admin/build/imagecache/' . $action['presetid'] . '/' . $action['actionid']),
            '#access' => $preset['storage'] !== IMAGECACHE_STORAGE_DEFAULT,
        );
        $action_form['remove'] = array(
            '#value' => l(t('Delete'), 'admin/build/imagecache/' . $action['presetid'] . '/' . $action['actionid'] . '/delete'),
            '#access' => $preset['storage'] !== IMAGECACHE_STORAGE_DEFAULT,
        );
        $form['actions'][$i] = $action_form;
    }

    $form['actions']['new'] = array(
        '#tree' => FALSE,
        '#type' => 'fieldset',
        '#title' => t('New Actions'),
        '#collapsible' => TRUE,
        '#collapsed' => count($preset['actions']) > 0,
        '#access' => $preset['storage'] !== IMAGECACHE_STORAGE_DEFAULT,
    );
    foreach (imagecache_action_definitions() as $action => $definition) {
        $form['actions']['new'][] = array(
            '#type' => 'markup',
            '#prefix' => '<div>',
            '#suffix' => '</div>',
            '#value' => l(t('Add !action', array('!action' => $definition['name'])), 'admin/build/imagecache/' . $preset['presetid'] . '/add/' . $action) .
            ' - ' . $definition['description'],
        );
    }

    // Display a preview image for this action. Put it below the submit button so
    // users don't have to do a bunch of scrolling.
    $preview_path = file_create_path('imagecache_sample.png');
    if (!file_exists($preview_path)) {
        // Copy of the image into the files directory so rather than generating it
        // from the original so we don't end up creating subdirectories mirroring
        // the path to the this module.
        $preview_path = drupal_get_path('module', 'imagecache_ui') . '/sample.png';
        file_copy($preview_path, 'imagecache_sample.png');
    }
    imagecache_image_flush($preview_path);
    $imagecache_path = imagecache_create_url($preset['presetname'], $preview_path, TRUE);
    $form['preview'] = array(
        '#type' => 'item',
        '#title' => t('Preview'),
        '#value' => l($imagecache_path, $imagecache_path) . '<br />' . l("<img src='$imagecache_path' />", $imagecache_path, array('html' => TRUE)),
        '#weight' => 10,
    );

    return $form;
}

function imagecache_ui_preset_form_validate($form, &$form_state) {
    $values = $form_state['values'];
    // Check for duplicates
    foreach (imagecache_presets() as $preset) {
        if ($values['presetname'] == $preset['presetname'] && $values['presetid'] != $preset['presetid']) {
            form_set_error('presetname', t('The preset name you have chosen is already in use.'));
            break;
        }
    }

    // Check for illegal characters in preset names
    if (preg_match('/[^0-9a-zA-Z_\-]/', $values['presetname'])) {
        form_set_error('presetname', t('Please only use alphanumeric characters, underscores (_), and hyphens (-) for preset names.'));
    }
}

function imagecache_ui_preset_form_submit($form, &$form_state) {
    // Save the preset first to retrieve the presetid when overriding
    $preset = imagecache_preset_save($form_state['values']);

    // Populate the presetid as needed for overrides
    if (isset($form_state['values']['actions'])) {
        foreach ($form_state['values']['actions'] as $action) {
            if (empty($action['presetid'])) {
                $action['presetid'] = $preset['presetid'];
            }
            imagecache_action_save($action);
        }
    }

    // Push back to the preset form
    $form_state['redirect'] = 'admin/build/imagecache/' . $preset['presetid'];
}

function theme_imagecache_ui_preset_actions($form) {
    $header = array(t('Action'), t('Settings'));
    // $header = array(, t('Weight'), '','');
    $rows = array();
    foreach (element_children($form) as $key) {
        if (!is_numeric($key)) {
            continue;
        }
        $row = array();
        $row[] = drupal_render($form[$key]['name']);
        $row[] = drupal_render($form[$key]['settings']);

        // Check for form access before rendering these portions of the table / header
        if (!empty($form[$key]['weight']['#access'])) {
            if (empty($header['weight'])) {
                $header['weight'] = t('Weight');
            }
            $form[$key]['weight']['#attributes']['class'] = 'imagecache-action-order-weight';
            $row[] = drupal_render($form[$key]['weight']);
        }
        if (!empty($form[$key]['configure']['#access'])) {
            if (empty($header['configure'])) {
                $header['configure'] = '';
            }
            $row[] = drupal_render($form[$key]['configure']);
        }
        if (!empty($form[$key]['remove']['#access'])) {
            if (empty($header['remove'])) {
                $header['remove'] = '';
            }
            $row[] = drupal_render($form[$key]['remove']);
        }
        $rows[] = array(
            'data' => $row,
            'class' => 'draggable',
        );
    }

    $output = '';
    if ($rows) {
        drupal_add_tabledrag('imagecache-preset-actions', 'order', 'sibling', 'imagecache-action-order-weight');
        $output = theme('table', $header, $rows, array('id' => 'imagecache-preset-actions'));
    }
    $output .= drupal_render($form);
    return $output;
}

/**
 * Page with form for adding a new action to add to a preset.
 */
function imagecache_ui_action_add_page($preset, $actionname) {
    // Make sure the name is valid.
    if (!$definition = imagecache_action_definition($actionname)) {
        drupal_set_message(t('Unknown action.'), 'error');
        drupal_goto('admin/build/imagecache/' . $preset['presetid']);
    }
    $action = array(
        'presetid' => $preset['presetid'],
        'action' => $actionname,
        'data' => array(),
    );
    return drupal_get_form('imagecache_ui_action_form', $preset, $action);
}

function imagecache_ui_action_form($form_state, $preset, $action) {
    // Do some error checking.
    if (empty($preset['presetid'])) {
        drupal_set_message(t('Unknown preset.'), 'error');
        drupal_goto('admin/build/imagecache');
    }
    if (empty($action['action']) || !$definition = imagecache_action_definition($action['action'])) {
        drupal_set_message(t('Unknown action.'), 'error');
        drupal_goto('admin/build/imagecache/' . $preset['presetid']);
    }
    if ($action['presetid'] != $preset['presetid']) {
        drupal_set_message(t('This %action action is not associated %preset preset.', array('%action' => $action['action'], '%preset' => $preset['presetname'])), 'error');
        drupal_goto('admin/build/imagecache/' . $preset['presetid']);
    }

    $form['#tree'] = TRUE;
    $form['presetid'] = array(
        '#type' => 'value',
        '#value' => $action['presetid'],
    );
    $form['actionid'] = array(
        '#type' => 'value',
        '#value' => isset($action['actionid']) ? $action['actionid'] : '',
    );
    $form['action'] = array(
        '#type' => 'value',
        '#value' => $action['action'],
    );

    if (!empty($definition['file'])) {
        require_once($definition['file']);
    }
    if (function_exists($action['action'] . '_form')) {
        $form['data'] = call_user_func($action['action'] . '_form', $action['data']);
    }

    $form['submit'] = array(
        '#type' => 'submit',
        '#value' => empty($action['actionid']) ? t('Create Action') : t('Update Action'),
    );
    return $form;
}

function imagecache_ui_action_form_submit($form, &$form_state) {
    imagecache_action_save($form_state['values']);
    if (empty($form_state['values']['presetid'])) {
        drupal_set_message(t('The action was succesfully created.'));
    } else {
        drupal_set_message(t('The action was succesfully updated.'));
    }
    $form_state['redirect'] = 'admin/build/imagecache/' . $form_state['values']['presetid'];
}

function imagecache_ui_action_delete_form($form_state, $preset = array(), $action = array()) {
    if (empty($action)) {
        drupal_set_message(t('Unknown Action.'), 'error');
        drupal_goto('admin/build/imagecache');
    }
    if (empty($preset)) {
        drupal_set_message(t('Unknown Preset.'), 'error');
        drupal_goto('admin/build/imagecache');
    }

    $form = array();
    $form['actionid'] = array('#type' => 'value', '#value' => $action['actionid']);
    return confirm_form(
            $form, t('Are you sure you want to delete the !action action from preset !preset?', array('!preset' => $preset['presetname'], '!action' => $action['name'])
            ), 'admin/build/imagecache', t('This action cannot be undone.'), t('Delete'), t('Cancel')
    );
}

function imagecache_ui_action_delete_form_submit($form, &$form_state) {
    $action = imagecache_action($form_state['values']['actionid']);
    imagecache_action_delete($action);
    drupal_set_message(t('The action has been deleted.'));
    $form_state['redirect'] = 'admin/build/imagecache/' . $action['presetid'];
}
